This issue first appeared about a month or so ago (just after the first updates) but then appeared to get fixed.
However, today the issues have resurface on both ios and android apps.
You'll see in my screenshots below.
click the map in the app and choose my station from the app . . .
everything in this screen is ok
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if I then click "view forecast" the location is correct but the data is coming from some unknown weather station named "Oamaru airport"
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interestingly, there is no "station info" button for this station.
Clicking the station shows my location on the map but with an airport icon over it.
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This corrected itself previously. Others have reported installing an earlier version of the WU app fixed it for them. I tried this (5.8.x) but got exactly the same incorrect results.
Checked on another android phone with a fresh install of the app and got exactly the same incorrect results.
Checked on ios and got the same wrong data again - so it is certainly garbage data coming out of WU.